A Systematic Review of In Vitro Retrograde Obturation Materials

By Theodosopoulou JN, Niederman R.

Date: 09/2006
Journal: JOE

Summary: 

Purpose

  (a) to determine which retrograde obturation (root-end filling) material(s) best prevent(s) retrograde dye/ink penetration in vitro, and

(b) to compare these results to the results of in vivo studies.

•Materials/Methods:

An electronic search of MEDLINE January 1966 to October, week 4, 2003 was conducted. Studies measuring the passive retrograde dye leakage were included. A 7 score Validity test rated the articles and only included articles with 5 or more. Inclusion criteria were assessed by 2 reviewers.

Most highlighted Results: 

  1. 34 studies met all of the inclusion and validity criteria.

2.Amalgam: lost its sealing ability over time.

3.EBA: lost its sealing ability over time.

4.IRM: reduced sealing ability over time.

5.MTA: reduced sealing ability over time.

6.GP: maintain its sealing ability over time.

7.Composites: maintain their sealing ability over time.

8.GIC: increase sealing ability over time.

9.For time points beyond 10 days the materials that provide the best sealing were, in decreasing order of efficacy: composites GIC amalgam orthograde GP EBA Fig.1,2 Table.5.

Clinical significance:   

MTA and IRM had the least leakage. However, interpreting these results in pts’ should be with caution as these ex-vivo studies do not fully replicates the oral environment.